So what does prepared mean for V8? I mentioned this before. You need to understand how V8 optimizes your JavaScript code. You need to understand how V8 actually works so that you can help it optimize your code. Because once you understand how V8 works, then when you actually write your JavaScript code, you can keep those things in mind and make sure that you don't make some of the mistakes that will fool V8. Make sure you learn the tools that are available to you. There's some great tools in Chrome, the dev tools. And V8 has some built-in tools in the debugging shell that can really help you understand what's going on in your JavaScript and help you make it better.